Dog bed



FIG. 1 is a top perspective view of a dog bed showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof; and,

FIG. 5 is a right side elevational view thereof, the left side being a mirror image thereof.

The zipper and handle are shown in broken lines, for illustrative purposes only, and form no part of the claimed design. 

The ornamental design for a dog bed, as shown and described. 